<template>
	<!-- 音频播放器组件 -->
	<view v-if='url' class='flex justify-between align-center audio'>

		<view class='mr-3'>{{getTime(Math.round(currentTime))}}</view>
		<view class='flex-1'>
			<slider @change='changeAudio' :activeColor='activeColor' :min='0' :max='duration.toFixed(0)'
				:value='currentTime.toFixed(0)' :step='0.1'></slider>
		</view>
		<view class='mr-3'>{{getTime(Math.round(duration))}}</view>
		<view class='mr-3' @click='start(audioId)'>
			<image src='../../static/images/go.png' class='icon' v-show='!status'></image>
			<image src='../../static/images/pausebtn2.png' class='icon' v-show='status'></image>
		</view>
		<view class='mr-3' @click='next(audioId)'>
			<image src='../../static/images/back.png' class='icon' style="transform: rotateZ(180deg);"></image>
		</view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				context: null,
				currentTime: 0 + this.startTime,
				duration: 100,
				status: false
			}
		},
		props: {
			backTime: {
				type: Number,
				default: () => {
					return 2
				}
			},
			url: String,
			activeColor: {
				type: String,
				default: '#0E7EFC'
			},
			startPic: String,
			endPic: String,
			audioId: [String, Number],
			startTime: {
				type: Number,
				default: () => {
					return 0
				}
			}
		},
		watch: {

		},
		computed: {

		},
		created() {
			this.context = uni.createInnerAudioContext();
			this.context.src = this.url;
			this.onTimeUpdate();
			this.onCanplay();
			this.onEnded();
			uni.$on('stop', (id) => {
				if (id && id != this.audioId) {
					this.context.stop();
					this.status = false;
				} else if (!id) {
					this.context.stop();
					this.status = false;
				}
			})
		},
		methods: {
			start(id) { //点击播放
				let audioId = id;
				if (this.status) {
					this.context.pause();
					this.status = !this.status;
				} else {
					uni.$emit('stop', id)
					console.log(this.currentTime);
					if (this.currentTime == 0) {
						this.context.play()
						this.status = !this.status;
					} else if (this.currentTime == this.duration) {
						this.currentTime = 0 + this.startTime
						this.context.play()
						this.status = !this.status;
					} else if (this.currentTime > 0) {
						this.context.play()
						this.context.seek(this.currentTime)
						this.status = !this.status;
					}
				}
			},
			next(id) { //快进
				let audioId = id;
				if (this.currentTime + this.backTime < this.duration) {
					this.currentTime = this.currentTime + this.backTime
				} else {
					this.currentTime = this.duration
				}
				this.context.seek(this.currentTime)

			},
			onCanplay() { //进入可播放状态
				this.context.onCanplay(() => {
					this.context.duration;
					setTimeout(() => {
						this.duration = this.context.duration;
					}, 1000)
				})
			},
			onTimeUpdate() { //音频播放进度
				this.context.onTimeUpdate(() => {
					if (!Number.isFinite(this.context.duration)) {
						this.duration = this.context.currentTime + 10;
						this.currentTime = this.context.currentTime;
					} else {
						this.duration = this.context.duration;
						this.currentTime = this.context.currentTime;
					}
				})
			},
			onEnded() { //播放结束
				this.context.onEnded(() => {
					this.status = false;
					this.currentTime = 0;
				})
			},
			changeAudio(e) {
				let paused = this.context.paused;
				this.context.pause();
				this.context.seek(e.detail.value)
				if (!paused) {
					this.context.play();
				} else {
					this.currentTime = e.detail.value
				}
			},
			getTime(time) {
				let m = parseInt(time / 60);
				let s = time % 60;
				return this.towNum(m) + ':' + this.towNum(s);
			},
			towNum(num) {
				if (num >= 10) {
					return num;
				} else {
					return '0' + num;
				}
			}
		}
	}
</script>

<style>
	.audio {
		background: #F4F4F4;
		padding: 20rpx;
		/* width: 100%; */
	}

	.icon {
		width: 60rpx;
		height: 60rpx;
	}

	.flex {
		display: flex;
		flex-direction: row;
	}

	.justify-between {

		justify-content: between;
	}

	.align-center {
		align-items: center;
	}

	.flex-1 {
		flex: 1;
	}

	.ml-3 {
		margin-left: 30rpx;
	}

	.mr-3 {
		margin-right: 30rpx;
	}
</style>
